322 JOURNAL OF COMPARATIVE NEUROLOGY. 
displaced backward in relation to the operculum, so that the 
stilus is shorter, passes more directly outward and upward, and 
is joined more closely with the subsquamosal process of the 
quadrate (Fig. 5) than with the squamosum itself. It is, 
Fig. 5. Desmognathus fusca, adult, 76 mm. c—stilus columellae; ¢. /.— 
canalis lateralis; 4.—hyoid; wv. j.—vena jugularis; 7. c.—ramus com- 
municans; @. m.—depressor mandibuli; /. s,—subsquamosal process of 
quadratum ; s.— squamosum. 
however, joined to both bones by connective tissue, and with 
the cartilaginous process of the quadrate. This process is 
longer than the corresponding process in Spelerpes and is sepa- 
rated from the stilus by an interval of but (ca.) 50 w (Fig. 6). 
The squamosum and the subsquamosal process of the quadrate 
are essentially the same as in Spelerpes. Stilus and operculum 
are as in Spelerpes, though the cartilage in the columella is 
small. 
